Elmo Anthony Obey Jr. has lived nearly all his life within a few blocks’ radius of the converted Bedford-Stuyvesant house where he lives and works as the superintendent.

Mr. Obey, who goes by Tony, started working up to the job more than a decade ago, as he neared the end of a two-year stint at a Brooklyn rehabilitation center, recovering from years of substance abuse. He started by cleaning the halls of the grand old house on Bainbridge Street, because the owner was a doctor who used to keep his practice in the basement and had known Mr. Obey’s parents.

“When I was in the hospital, Doc was asking where I was,” Mr. Obey said. “He wanted to know how my health was. He wanted me to work with him.”

The concern for his well-being — and the small amount of cash from the cleaning work — made Mr. Obey, now 64, feel that he had someone looking out for him.

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The apartment is Mr. Obey’s home and workshop, where he keeps the tools of his trade.CreditAlex Welsh for The New York Times

By the time he left rehab in 2005, his parents’ house, where he had been living, had been sold, and all of his possessions, including his beloved collection of rock ’n’ roll records, had been thrown out. So he went back to the doctor, who agreed to rent him a studio for $750 a month.

A few years later, when Mr. Obey was laid off from a part-time UPS job, he and the doctor drew up a new lease agreement: He could live rent-free in exchange for working as the super of the nine-unit building.

He now lives on the second-floor, in a studio apartment with high ceilings and two large wood-framed windows, an ornate fireplace mantel, parquet floors and a big wardrobe built into one of the walls. One recent day, his fishing poles were propped up against a wall — he was planning to go out on a fishing boat from Sheepshead Bay on the weekend with his daughter and granddaughter.

“This whole room is my workshop,” Mr. Obey said of his home, which he shares with two betta fish — one lives on the mantel and the other on the coffee table — and the tools of his trade. A quick scan of the room revealed mouse poison, glue traps, garbage bags and pine cleaner.

At the moment, Mr. Obey is taking care of four other buildings in the neighborhood, including the large house across the street, as well as cutting grass, landscaping, sweeping steps and taking out trash for several nearby properties. He also makes a small income from referring renters to local brokers’ listings.

Cobbling together an income sometimes leaves considerable gaps. His gas and electricity have been shut off for months at a time when work around the neighborhood slowed down. But Mr. Obey has taken such shutdowns in stride, likening the situation to camping, and using an extension cord from the hall to listen to the radio.

He grew up around the corner, in a house on Decatur Street, and was a track star in high school — the fastest in Brooklyn in the 880 relay in 1968, he said. But it was in high school that he also got into drugs, which continued to plague his life on and off until he checked himself into rehab in 2002.

During the intervening decades, he did many other things: worked in the mailroom of a public relations firm; went to college at night for a few years, studying architecture and drafting; and raised a daughter with the help of his parents, after he and the girl’s mother split up.

“I stayed out of trouble and kept my jobs. I was always a working addict,” he said. “It was so cheap then, it was bad. If you were strong enough to pull out, you were lucky. I had a lot of friends who passed away. Drugs got a lot of people in the neighborhood.”

He feels best when he stays active and motivated, so he gets up at 5 a.m. — “that’s a recovery thing for me” — and fills his days with work. At the Bainbridge house, his regular tasks include fixing leaks, painting, sweeping, mopping and polishing the copious woodwork. He occasionally takes care of one tenant’s cats.

“Trust — that’s the main thing in this business,” Mr. Obey said, adding that building trust with new tenants can be difficult. “Some people trust you, some don’t; some won’t even talk to you.”

But he enjoys a warm relationship with many of the building’s residents. One tenant, who learned of Mr. Obey’s love of rock ’n’ roll, sometimes invites him in to listen to Pink Floyd’s “Dark Side of the Moon.”

Which is why the news that the owner is planning to sell the building, delivered earlier this year, hit him particularly hard. “I was shocked,” said Mr. Obey, who has been told that he will have to move out when the property changes hands.

Ideally, he said, he would move into the property he manages across the street, but he has yet to broach the subject with the owner. He hopes to stay in the area, but isn’t fussy about the space.

“I don’t have any requirements,” Mr. Obey said. “If I have to move to the basement, that’s fine. As long as I’ve got my TV and my tape player.”